Bosch Appliances GWH 2700 ES LP, ESVVT, GWH 2700 ES NG manual Electrical diagram

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Electrical diagram

9Electrical diagram

16

15

20

M

19

18

17

21

22

Fig. 59 Electrical scheme

1Intlet water temperature sensor

2 Outlet water temperature sensor

3 Backflow temperature sensor

4 Cascading output connection

5 Cascading input connection

6 Ionization sensor

7 Water flow sensor

8 Flue gas limiter

9 Heat exchanger overheat sensor (ECO)

10 Gas valve

11 Jumper resistance

12 Water valve

13 Primary fan

14 ON/OFF switch

15 Secondary fan

16AC plug

17Main connection

18Ignition electrodes

19Ground post

20Antifreeze kit connection

21Fuse

22Fuse

13

 

12

 

 

 

 

 

 

 

M

E

M PS

 

 

 

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

T=104°C

 

 

 

 

 

 

 

 

T=220°F

9

 

 

 

 

 

 

 

 

 

T=110°C

 

 

 

 

 

 

 

 

 

T=230°F

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

FS

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

Casc.

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Casc.

4

 

 

 

 

 

 

 

output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Back￿flow

3

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

1

 

 

16￿￿￿￿￿￿￿￿￿...￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿1 20￿￿￿￿￿￿￿￿￿￿￿...￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿1

 

 

 

 

 

 

14

JP2

JP8

 

 

 

 

 

 

 

JP7

 

 

 

 

 

 

 

 

JP6

 

 

 

 

 

 

 

 

JP5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6720608542-04.1AL

 

 

 

 

 

6 720 608 542

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Contents What to do if you smell gas Intended for variable flow applicationsIndex For your safety Appliance details FeaturesSpecifications Technical data To remove combustion cover service only Unpacking the heaterGWH 2700 ES is not approved or designed for Venting General rules to follow for safe operationDimensions Dimensions and Minimum installation clearancesTools required for installation Installation instructionsIntroduction VentingInstallation instructions Horizontal venting systems only Venting SpecificationsFittings or Piping Equivalent Feet Twin pipe termination clearances Installation instructions Condensate drain requirementsMinimum combustion air and exhaust pipe length Maximum combustion air and exhaust pipe lengthCanadian installations1 Installations2 Canadian installations1 Horizontal twin pipe penetration Vent connections Vertical venting installation twin pipe penetra- tionVenting Flex ProTech Heat Fab Installation instructions Condensate drain installationExhaust Total equivalent vent length calculationIntake ExampleAdjusting minimum power fan speed P2 Adjusting maximum power fan speed P1Level Vent length1 Speed P2 Installation instructions Twin pipe and Concentric pipe Combustion air requirementsProper location for installing your heater Heater placement and clearancesMounting installation Gas piping & connections GAS Line Sizing For Natural GAS Water quality Water connectionsGWH Domestic hot water recirculationMeasuring gas pressure Connecting manometerStatic Pressure Test Operating Pressure TestElectrical power supply Electrical connectionsPosition of the fuses in control unit LCD Display functions Operation instructionsFor your safety read before operating your water heater PowerTemperature selection Reset button Use of optional remote control Accessory part no. TSTAT2Operation Program buttonAnnual maintenance table Every year Maintenance and serviceAnnual maintenance Winterizing for seasonal useAdjusting CO2 carbon dioxide Descaling using a pumpMineral scale build-up Adjusting CO2 Measuring CO2 combustion cover must be installedReturning to Service Once Gas Pressure is adequate% 3.0 % 60 ppm Final ReadingsProgram Description Factory Default Program valuesComment Diagnostic menu Control board diagnosticsTroubleshooting TroubleshootingWater is too hot Water is not hot enoughHot water temperature fluctuates at tap Low water flow/pressureNoisy burner/heater during operation Lack of adequate gas pressure. Inadequate gas Error code diagnostics Problem solvingVenting may cause this failure Problem solving Display Cause SolutionOver-temperature detected by No flame ionization detected with Electrical diagram Electrical diagramSensor resistance charts Back Flow characteristics Functional scheme GWH 2700 ES Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Appliance overview Components diagram GroupDescription Reference Interior components diagram and parts list Group 1211 6720608158-73.1AL Interior components diagram and parts list Group 708 300 Protecting the environment Protecting the environmentPacking ComponentsLimited Warranty Limited Warranty 6720608542